Propeller-wheel.



No, 821,534. PATENTED MAY 22, 1906.

H. J. PERKINS. PROPELLER WHEEL.

APPLICATION FILED JUNE 2. 1905.

I an especiall UNITED STATES 'PA'rENfr oEEIoE.

'i .HARRY 1J. PERKINS, .DE GRAND RAPIDS, Miei-IIGAN, AssIGNoR or oNE- THIRD 'ro FREDERICK n.' PERKINS AND PER-EINS, or GRAND RAPIDS, MICHIGAN.

ONE-THIRD TO CHARLES E.

PnoPELLEn-WHEEI..

No. senaat.

Specification of Letters Patent.

Patented may ae, 190e.

To all whom it may concern,.-

Be it known that I, HARRY J. PERKINS, a citizen of the United States, residing at Grand Rapids, in the lcounty of Kent and 5 State of Michigan, have invented new and useful Improvements in Propeller-Wheels,A of which the followin is a specification.

My invention reates .to improvements in propeller-wheels, and particularly to that Io class of propeller-wheels made in sections, so

that a broken section can easily be replaced, and having the blades adjustable to any desired pitch. Its'object is toprovide vforsuch sectional and adjustable construction and in efficient and simple manner. This object 1s accomplished by the construction shown in the accompanying drawings, in 'which- Figure 1 is an end plan view of the wheel,

am showing the end of the hub and the three blades. Fig. 2 is an'end plan view of one of the blades detached and looking from the outer end toward the center. Fig. 3 is a longitudinal cross-section of the hub, showing in 2 5'projection the adjusting-screw and a portion of the blade. Figli is a top plan ofthe hub, showing the openin into which the shaft of the blade is inserte Fig. 5 ,is a cross-section of the hub on a plane at right angles to 3o. its axis, showing also in plan portions of the blades. Fig. 6 is an end view of the hub, cn

alarger scale than Fig. 1, showin the adjustin -s'crews and portions of the bl have shown a threefbladed wheelybut the invention'ma wheel having a di erent number o blades.

des.

as well be -ap lied to a In the drawings, C isfthe ropell'er-shaft,

and B is thehu'b of the propel er-wheel. 'This hub is detachably connected. tothe shaft by 4G '.any common means, such as the pin and key shownfin Fig. 3. The central portion ofthe hub is swelled, as shownl in F' s. 3 and 4, `and at each pointwhere the bla ,eswspring from the h'ub that portion of the hub is developed into substantially-the-shape ofthe segment of a sphere. The outer ortion of this segment. ofa sphere is forme as an'inte ral art of the blade, and the joint between t e b ade and the hub is' therefore of the same form,

5o and the two parts are related to each other in the same way as if a segment of a sphere l -were cut from the main body of the sphere. This form permits the blade to rotate on its adjusting or lockng'screws or pins.

` three blades.

central axis, thus changing the pitch of the blade, but maintainin at all times a smooth and perfect joint at al oints with the hub Each ofthe pro eher-blades is represented by the letter A. 4ro'm the inner crd of each b ade 'there projects a short centrally-located portion which may be spoken of asa shaft, since it performs some. of the functions of a shaft in permitting the rotation of the blade in the hub. It is shown by G in Figs. 2, 3, and 5. Upon its end, which when the blade is in position is the inner end, it carries the brokenflange D.

In the flat surface of the hub caused by cuttin 0H the blade inthe manner above describe there is an opening, (shown by F in Fig. 4,) the main body of whichopenin is of a size sufficient to receive the shaft and which'` is at one or more places expanded so as to permit the -'lan e D to pass therethrough. This opening extens into the interior of the hub, which may be solid excepting fora suitable space shortly below the surface or may be entirely hollow. By reason of this interior space the parts marked H H' in Fig. 4 become va rbroken flange partially surroundlng the oeningl F.

E as s ownin Fig..4, constitute a p l; of y are adapted to bear against the corners of the flan es D upon the blade-shafts when the 4bla es are in position. There are as many pairs of these adjusting-screws as there are lades.

The complete propeller-wheel shown is con-l structed in four main When 1t is desired to et the wheel ready `for use, I. take the bla e and turn it sol that the broken flange D will register with the Vopenings in the broken Harige-H,

arts-the hub and the and so will pa'ss therethrough. QI then give the'l blade a quarter-turn or as-much as may -be necessary, and these two broken flanges D and H en age with each other, the lian e D being un er the flange H, so -thatwit drawal 'fof the wheel is Unpossible. 'I then continue to turn the blade until the position of exactly the desired pitch is-obtalned. I then turn up the adjusting-screws so that they bear against the two opposite shoulders or portions of the flange D 'ust as they would do if the blade shown in ig. 2 were inserted .in the hub shown in Fig. 4 and then turned blades.

until it occupied the same position which it has in Fig. 2.

If it is desired at any time to read'ust the pitch of the blades, it is evident t at the lade may be turned in either direction by loosening the proper screw and that =then if the other screw 1s turnedfin again to bear against the flange D the blade will again be It is evident that the means of engagement between the hub and blades and the means of locking the blade in its selected position may be greatly varied without departing from my invention.

Having thus described my invention, what I claim to have invented, and desire to secure by Letters Patent, is-

1. In a ro eller-wheel, the combination of a wheelu detachable blades and hubs carried thereby, projections in op osite di-l rections from the blade-hubs an located within the wheel-hub, the latter having an opening to receive said projections to ermit rotation of the blades, means carried y the wheel-hub for detachable engagement with said blade-hub, and independent adjusting devices bearing in opposite directions against the opposing projections f'rom'theblade-hub. 2. In a propeller-wheel, the combination of a hub, propeller-blades, means for detachably connecting the hub and blades, means for permitting the blades to rotate in the hub whereby the pitch of said blades ma)T be adjusted, and independent adjusting devices to act against separate parts of each blade to hold the latter in the desired pitch relation.

3; In a ropeller-wheel, the combination of the Whee -hub, detachable blades and hubs carried thereby, projections in opposite directions from the blade-hubs and Alocated within the wheel-hub, an opening within the wheel-hub` to receive such projections and permitting rotation of the blade, means carried by the wheel-hub for detachable engagement with such blade-hub, and two adjusting and locking screws located within the wheel-- hub and bearing in opposite directions against the opposing projections fromv thel blade-hub.

In testimony whereof I have hereunto setv my hand in presence of two subscribing witnesses.

HARRY J. PERKINS. Witnesses;

MARY S. TooKEn, A. C. DENIsoN. 

